CVE-2008-1274 in AIX
Summary
by MITRE
Untrusted search path vulnerability in man in IBM AIX 6.1.0 allows local users to execute arbitrary code via a malicious program in the man directory.
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Analysis
by VulDB Data Team • 06/01/2025
The vulnerability identified as CVE-2008-1274 represents a critical untrusted search path issue within the manual page viewer component of IBM AIX 6.1.0 operating system. This flaw resides in the man command execution mechanism which fails to properly validate the search paths used when locating manual pages and associated executables. The vulnerability stems from the system's default behavior of searching through multiple directories in a predetermined order without adequate sanitization of the path components. When a local user places a malicious executable with the same name as a legitimate manual page command within the man directory, the system's search algorithm will execute the malicious binary instead of the intended system utility. This type of vulnerability falls under the CWE-427 weakness category, specifically addressing uncontrolled search path elements where the application searches for executables or files using a path that contains untrusted elements. The issue is particularly concerning because it leverages the inherent trust placed in system directories by the operating system's execution model.
The technical exploitation of this vulnerability occurs when an attacker creates a specially crafted executable file with the same name as a system command that would normally be accessed through the man command interface. When a user subsequently invokes the man command to view documentation for a specific program, the system searches through the configured PATH environment variables including the man directory. If the malicious executable is placed in a directory that gets searched before the legitimate system binaries, the attacker's code will execute with the privileges of the user running the man command. This creates a privilege escalation scenario where local users can effectively bypass normal security controls and execute arbitrary code within the system context. The vulnerability is classified as a local privilege escalation issue under the ATT&CK framework's privilege escalation tactic, specifically mapping to the T1068 technique for local privilege escalation through untrusted search paths.
The operational impact of CVE-2008-1274 extends beyond simple code execution as it provides attackers with a persistent foothold within the AIX environment. Once exploited, the malicious code can be used to establish backdoors, modify system files, or escalate privileges to root access depending on the execution context and user permissions. The vulnerability is particularly dangerous in enterprise environments where multiple users may have access to the system and where the man command is frequently used for documentation lookup. Attackers can leverage this flaw to maintain long-term access to systems without requiring additional authentication mechanisms or complex exploitation techniques. The impact is amplified by the fact that this vulnerability affects the core system utilities that administrators and users rely upon daily, making detection difficult as the malicious activity appears to be legitimate system operation. Organizations running IBM AIX 6.1.0 systems should consider this vulnerability as a critical security concern requiring immediate remediation.
Mitigation strategies for CVE-2008-1274 should focus on both immediate patching and operational hardening measures. The most effective solution involves applying the official IBM security patches released for AIX 6.1.0 that address the untrusted search path implementation in the man command. System administrators should also implement strict directory permissions and access controls on the man directory and related system directories to prevent unauthorized modifications. The principle of least privilege should be enforced by ensuring that only authorized administrators can modify system directories containing executables. Additional protective measures include implementing file integrity monitoring solutions that can detect unauthorized modifications to critical system directories and establishing regular security audits of system configurations. The vulnerability demonstrates the importance of proper input validation and path resolution in system utilities, aligning with security best practices outlined in the OWASP Top Ten and NIST cybersecurity guidelines. Organizations should also consider implementing automated vulnerability scanning tools that can identify similar search path vulnerabilities across their entire system infrastructure to prevent similar issues from remaining undetected.